Excluding Rows based on Row Character in a Column Formula

[#1]

Hello Everyone 

I would like to calculate the column standard deviation ,but I would like to exclude a certain rows depending another row value. 

For example, in Excel, my formula in excel will be as follows, i.e the formula for each cell will calculate the standard deviation for other than the row :Columns value. 

e.g this is standard deviation formula when Columns == B is excluded 

e.g this is standard deviation formula when Columns == C is excluded

How can i do this in JMP using Column Formula? 

I have tried to use this Formula but, the result does not match with the excel Formula ?

Col Std Dev( :Value, :Columns, Excluded State( :Columns ) )

thank you in advance for reading my post and please let me know if there is an elegant solution for this.. 

Regards

Ashraff 

[#2 · Accepted solution]

What your Excel formulas are saying, is to exclude all of the rows from the calculation that have the same value of column Columns.  Here is the formula 

curColumns = :Columns;
Col Std Dev( If( :Columns == curColumns, ., :Value ) );

[#3]

Hi Txnelson. 

thank you very much. This is very helpfull